Did I create N-gons?
Yes you created an ngon in the back. Being that It's in the back maybe it's not a problem. If you are encountering a problem a very easy thing to try is to inset the ngon face which gives you quads around the perimeter of the ngon which will solve some problems. If you want to rework your topology so that you don't have ngons or unnecessary geometry on the sides without detail I recommend watching this video which shows how to step down your faces while maintaining quad geometry: https://www.youtube.com/watch?v=HGL6QpVRyXk&amp;list=PL0v8ug1WwacVeXGNVRHexenYbip_7LMPD&amp;index=19&amp;ab_channel=DECODED